[t0mas88]

Yes, the London region already published a test advisory to verify that all systems are working. It illustrates what a real one could look like: https://www.metoffice.gov.uk/public/data/vaac/vag/pfxd01_egr...

The northern part of the Atlantic route system (EU-US) goes through there. And big parts of UK airspace could be affected.

[solardev]

Lol, I like it. I kinda wish we'd do that in software status pages too. "This is a test of our emergency status page. This is only a test. It's also the only time you'll actually see red on this page."